Games like House Number 666
Games like House Number 666 include Look Outside, Five Nights at Freddy's: Into the Pit, DISTRAINT: Deluxe Edition, Mad Father, and Poppy Playtime. We matched them by the tags players give House Number 666 on Steam (Survival Horror, Walking Simulator, Horror, 2D, and Casual): closest matches first, and among equally close ones the better-known games.

Look Outside
Shared: Survival Horror · Horror · Pixel Graphics

Five Nights at Freddy's: Into the Pit
Shared: Horror · 2D · Adventure

DISTRAINT: Deluxe Edition
Shared: Horror · Indie · 2D

Mad Father
Shared: Horror · Survival Horror · 2D

Poppy Playtime
Shared: Horror · Survival Horror · Singleplayer

Firewatch
Shared: Walking Simulator · Adventure · Indie

Slender: The Arrival
Shared: Survival Horror · Horror · Indie

Among the Sleep - Enhanced Edition
Shared: Horror · Indie · Walking Simulator

LIMBO
Shared: Indie · 2D · Horror

Five Nights at Freddy's: Security Breach
Shared: Survival Horror · Horror · Exploration

SOMA
Shared: Horror · Survival Horror · Exploration

Visage
Shared: Survival Horror · Horror · Walking Simulator

The Witch's House MV
Shared: Horror · 2D · Indie

Outlast
Shared: Survival Horror · Horror · Adventure

Escape the Backrooms
Shared: Horror · Survival Horror · Adventure

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Adventure

Bendy and the Dark Revival
Shared: Horror · Survival Horror · Indie

Firework
Shared: Horror · 2D · Indie

Little Nightmares
Shared: Horror · Adventure · Indie

Inside the Backrooms
Shared: Survival Horror · Horror · Adventure

Cookie Clicker
Shared: Horror · Casual · Indie

IMSCARED
Shared: Horror · Indie · Pixel Graphics

FEZ
Shared: Indie · Pixel Graphics · Casual

ANIMAL WELL
Shared: Horror · Exploration · 2D